TBL-Spinal Cord Pathways Flashcards
Dorsal rami of C1-4 are located in what region?
Suboccipital
C3-C5 make the roots of what named nerve?
Phrenic
At what level does the spinal cord end?
L1-L2
motor cell bodies are in what horn of the cord?
Ventral (anterior)
Biceps are innervated by what spinal level?
C5/6
Triceps are innervated by what spinal level?
C7 (6-8)
finger flexors are innervated by what spinal level?
C8
Knee is innervated by what spinal level?
L3
Ankle is innervated by what spinal level?
S1
sensory cell bodies are in what horn of the spinal cord?
Dorsal
Each dorsal root contains the input from all structures within its distribution, forming a (blank)
somite
What are the dermatomal levels for the following structures?
- Post head and neck
- Nipple
- Umbilicus
- Anus
- C2/3
- T4
- T10
- s4/c1
The anterior spinal artery occupies what groove on the spinal cord?
anterior median fissure
The anterior and posterior nerve rootlets emerge at the (blank) and (blank) sulci respectively.
anterolateral and posterolateral
What are the three funiculi of the white matter?
posterior, lateral, and anterior?
What are the four parts of the gray matter?
Anterior/ventral horn
posterior/dorsal horn
intermediate zones
lateral horns
What is contained in the ventral horn of the cord?
motor neurons
lamina 8, 9, and part of 7
what is contained in the dorsal horn of the cord?
sensory neurons
lamina 1-6
intermediate zone of spinal cord gray contains what/
associate neurons
lamina 7
what is in the lateral horns of the cord?
sympathetic neurons
The substantia gelatinosa and proper sensory nucleus extend through the whole length of the cord and receive (blank) type of input
pain
Is the corticospinal tract ascending or descending?
Descending
How many descending motor tracts are there?
6
Corticospinal tract neurons arise from lamina 5 within which gyrus?
Precentral gyrus
